S-91571A342 1"-8 x 6" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional structural integrity with Grade A325 classification and 120,000 psi tensile strength for reliable performance in heavy-load applications
- Superior wear resistance due to Rockwell C19 hardness, ensuring extended service life under demanding conditions
- Optimized load distribution through 4 1/4" grip length and partial threading design for enhanced joint stability
- Quick installation efficiency with coarse UNC threads and external hex drive, reducing assembly time in industrial settings
- Precision thread compatibility with Class 2A fit, minimizing cross-threading risks while maintaining secure fastening
- Robust corrosion management through compliant steel construction, suitable for harsh industrial environments
- Regulatory confidence with full compliance to RoHS 3 and REACH environmental standards
Professional Applications & Engineering Value
Engineered for structural steel connections and heavy machinery assembly, this Grade A325 hex head screw addresses critical challenges in construction and industrial applications. The 1"-8 UNC coarse thread configuration ensures rapid installation while maintaining vibration resistance, particularly valuable in structural fastening scenarios where time efficiency and reliability are paramount. The partially threaded design concentrates tensile strength at the shank-to-thread transition zone, preventing stress concentration failures. Manufactured from high-strength steel with external hex drive compatibility, this fastener delivers consistent performance in bolted joints requiring predictable clamp load behavior, making it ideal for bridge construction, structural frameworks, and heavy equipment manufacturing where ASME B18.2.6 compliance is mandatory.
Specification Summary & Compliance
This hex head screw maintains Class 2A thread fit tolerances per UNC standards, ensuring precise engagement with mating components. Manufacturing adheres to ASME B18.2.6, ASTM A325, and ASTM F3125 specifications governing dimensional accuracy and mechanical properties. The fastener is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for industrial components.
